Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference (한국조명전기설비학회:학술대회논문집)
- 2005.11a
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- Pages.387-390
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- 2005
Three-phase current-fed soft-switching type resonant DC-link snubber converter with switched capacitor
스위치 캐패시터형 공진 DC-링크를 사용한 3상 전류형 소프트 스위칭 PWM 컨버터
- Kim, Ju-Yong (Kyungnam University) ;
- Suh, Ki-Young (Kyungnam University) ;
- Lee, Hyun-Woo (Kyungnam University) ;
- Mun, Sang-Pil (Kyungnam University) ;
- Kim, Young-Mun (Masan college)
- Published : 2005.11.04
Abstract
A This paper presents a novel three-phase current-fed Pulse Width Modulation converter with switched- capacitor type resonant DC link commutation circuit operating PWM pattern strategy under a design consideration of low-pass filter, which can operate on the basis of the principle of zero current soft-switching commutation. In the first place, the steady-state operating principle of this converter with a new resonant DC link snubber circuit is described in connection with the equivalent operation circuit, together with the practical design procedure of the switched-capacitor type resonant DC link circuit is discussed from a theoretical viewpoint on the basis of a design example for high-power applications. The actively delayed time correction method to compensate distorted currents due to a relatively long resonant commutation time is newly implemented in the open loop control scheme so as to acquire the new optimum PWM pattern. Finally, the experiment or set-up in laboratory system or this converter is concretely demonstrated herein to confirm a zero current soft-switching commutation of this converter. The comparative evaluations between current-fed hard switching PWM and soft-switching PWM converters are carried out from a viewpoint of their PWM converter characteristics.
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